So did a more... muscular... relative of mine repeated the same thing to them in my presence.

If it were me, I would go over to the unit, and take some muscular friends with me, move his stuff outside, set him outside; and lock the door.

I'll have him work on a product line of solid inexpensive massage/stretching devices that primarilly function by floors, walls, ceilings, doorways and basic furniture that has been passively developing in my head over the few years that I've been dealing with a lot of stress related muscular pain, not to get personal but maybe I may have run into this fellow for another purpose than so far assumed.